Added CUPS guide

how-to-disable-cups-pinter-job-history-on-macos/README.md

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+<!--
+Title: How to disable CUPS pinter job history on macOS
+Description: Learn how to disable CUPS pinter job history on macOS.
+Author: Sun Knudsen <https://github.com/sunknudsen>
+Contributors: Sun Knudsen <https://github.com/sunknudsen>
+Reviewers:
+Publication date: 2022-10-29T13:05:18.112Z
+Listed: true
+-->
+
+# How to disable CUPS pinter job history on macOS
+
+## Requirements
+
+- Computer running macOS Monterey or Ventura
+
+## Setup guide
+
+### Step 1: clear job history
+
+> Heads-up: purges `/var/spool/cups`.
+
+```shell
+$ cancel -a -x
+```
+
+### Step 2: create `/usr/local/sbin` directory
+
+```shell
+sudo mkdir -p /usr/local/sbin
+sudo chown ${USER}:admin /usr/local/sbin
+```
+
+### Step 3: create `cups.sh` script
+
+```shell
+cat << "EOF" > /usr/local/sbin/cups.sh
+#! /bin/sh
+
+set -e
+
+if grep -qe '^PreserveJobHistory Off$' /etc/cups/cupsd.conf; then
+  exit 0
+fi
+
+echo "PreserveJobHistory Off" | sudo tee -a /etc/cups/cupsd.conf
+
+launchctl unload /System/Library/LaunchDaemons/org.cups.cupsd.plist
+
+launchctl load /System/Library/LaunchDaemons/org.cups.cupsd.plist
+EOF
+```
+
+### Step 4: make `cups.sh` executable
+
+```shell
+chmod +x /usr/local/sbin/cups.sh
+```
+
+### Step 5: create `local.cups.plist` launch daemon
+
+```shell
+cat << "EOF" | sudo tee /Library/LaunchDaemons/local.cups.plist
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+  <dict>
+    <key>Label</key>
+    <string>local.cups</string>
+
+    <key>ProgramArguments</key>
+    <array>
+        <string>/usr/local/sbin/cups.sh</string>
+    </array>
+
+    <key>RunAtLoad</key>
+    <true/>
+  </dict>
+</plist>
+EOF
+```
+
+### Step 6: reboot